EP0336923A2 - Process for valorization of zinciferous flue dusts and muds - Google Patents

Process for valorization of zinciferous flue dusts and muds Download PDF

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Publication number
EP0336923A2
EP0336923A2 EP19890890090 EP89890090A EP0336923A2 EP 0336923 A2 EP0336923 A2 EP 0336923A2 EP 19890890090 EP19890890090 EP 19890890090 EP 89890090 A EP89890090 A EP 89890090A EP 0336923 A2 EP0336923 A2 EP 0336923A2
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EP
European Patent Office
Prior art keywords
pellets
zinc
dusts
agglomerates
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP19890890090
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German (de)
French (fr)
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EP0336923A3 (en
Inventor
Walter Dipl.- Ing. Dr. Lugscheider
Luzian Dipl.-Ing. Pochmarski
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Voestalpine Stahl Donawitz GmbH
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Voestalpine Stahl Donawitz GmbH
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Publication of EP0336923A2 publication Critical patent/EP0336923A2/en
Publication of EP0336923A3 publication Critical patent/EP0336923A3/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/961—Treating flue dust to obtain metal other than by consolidation

Definitions

  • the invention relates to a method for recycling Zn-containing dust and sludge.
  • the invention now aims to provide a simple and inexpensive method for recycling zinc-containing dust and sludge, with which both Blast furnace, gout and LD mixed sludge as well as the gust, blast furnace and converter dust arising from dry dedusting can be disposed of.
  • the process according to the invention essentially consists in that the Zn-containing metallurgical dusts and sludges are agglomerated, cold briquetted or pelletized with a carbon carrier, that the agglomerates or pellets with a degree of metallization of at least 30% by weight, preferably at least 40% by weight, and that a C content of 20 to 25% is set in the production of pellets by adding carbon carriers and the batch of a melting furnace for melting metal from metallized batches, such as scrap or pig iron, be added.
  • the dusts By agglomerating, in particular pelletizing, the dusts, optionally with the addition of sludges, dusts with a content of 40 to 50% by weight can be obtained from the melting process, in particular if the melting process is carried out according to the so-called KVA process. Win zinc.
  • KVA process is an allothermal converter process in which scrap with coal and aggregates is melted in a suitable crucible with natural gas or liquid fuels and oxygen.
  • the proportion of zinc oxide in the slag brings with it the problems with the admissibility and the costs of a special landfill shown at the beginning.
  • the zinc taken up by the dust increases the zinc yield as metallic zinc and, using the iron credit to a large extent, already achieved metallization in dry dedusting, a further improvement in iron spreading can be achieved if one adds carbon carriers, preferably top and blast furnace sludges as carbon carriers Reduction of non-metallized parts of the metallurgical dusts is achieved.
  • carbon carriers preferably top and blast furnace sludges as carbon carriers
  • the agglomerates or pellets to be used in the process according to the invention are used with a degree of metallization of at least 30% by weight, preferably at least 40% by weight, it being possible to ensure such a high degree of metallization by adding during the production of the pellets a carbon content of 20 to 25% by weight is set for carbon carriers.
  • pelleting can be carried out with relatively simple means while maintaining pellets with good strength.
  • a binder such as lime milk and / or lime is advantageously added to increase the strength of the pellets and thus to reduce additional dust discharge for hardening and drying the pellets.
  • Such pellets can be used to charge the additives that are usually charged with the KVA process can be used in smaller amounts, and in particular an optionally desired addition of lime can be reduced to the same extent as it has already been used for curing and drying the pellets.
  • agglomerates or pellets of the following composition are advantageously: 20-25% by weight carbon carrier 5% by weight of binder Rest of hut dust containing ZnO, and / or PbO and / or Fe2O3 and / or MgO and / or SiO2 and / or CaO used.
  • binder Rest of hut dust containing ZnO, and / or PbO and / or Fe2O3 and / or MgO and / or SiO2 and / or CaO used used.
  • the method in particular with regard to the KVA method, in which the melting heat required for melting molten iron from scrap is applied by burners inside the furnace, the method is advantageously carried out in such a way that the agglomerates, briquettes or pellets in an amount of 2 to 8 wt .-%, preferably 5 wt .-%, are added to the metallic batch. It is thus possible to process relatively high proportions of metallurgical dusts or sludge without affecting the melting process, while at the same time ensuring that the proportion of zinc contained in the zinc-containing dusts gets into the KVA dust and not into the slag as metallized zinc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Bei einem Verfahren zur Verwertung von Zn-hältigen Hüttenstäuben und -schlämmen werden die Zn-hältigen Stäube und -schlämme agglomeriert, kalt brikettiert oder pelletiert und der Charge eines Einschmelzofens für das Erschmelzen von Metall aus metallisierten Chargen, wie z.B. Schrott oder Roheisen, zugesetzt. Hiezu werden insbesondere Agglomerate oder Pellets mit einem Metallisierungsgrad von wenigstens 30 Gew.-%, vorzugsweise wenigstens 40 Gew.-%, eingesetzt.In a process for recycling Zn-containing steel dusts and sludges, the Zn-containing dusts and sludges are agglomerated, cold briquetted or pelletized and the batch of a melting furnace for melting metal from metallized batches, e.g. Scrap or pig iron, added. Agglomerates or pellets with a degree of metallization of at least 30% by weight, preferably at least 40% by weight, are used in particular for this purpose.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Verwertung von Zn-hältigen Hüttenstäuben und -schlämmen.The invention relates to a method for recycling Zn-containing dust and sludge.

Eine Entsorgung von Zn-hältigen Hüttenstäuben und -schlämmen über den Einsatz als Sekundärrohstoffe in Zinkhütten ist bei Zinkgehalten unter 20 Gew.-% nicht wirtschaftlich. Die fehlende Wirtschaftlichkeit ergibt sich zum einen aus den hohen Kosten hydrometallurgischer Verfahren mit nachgeschal­teter Elektrolyse und zum andern aus der Tatsache, daß hohe Mengen hoch eisenhältiger Restschlämme entstehen. Wirtschaft­liche Entsorgungen derartiger Zinkabfälle sind gegenwärtig über Drehrohrofenprozesse ab Zinkgehalten von etwa 30 Gew.-% möglich.Disposing of Zn-containing metallurgical dust and sludge through the use as secondary raw materials in zinc smelters is not economical with zinc contents below 20% by weight. The lack of economy results on the one hand from the high costs of hydrometallurgical processes with downstream electrolysis and on the other hand from the fact that large quantities of high iron-containing residual sludge are produced. Economic disposal of such zinc waste is currently possible via rotary kiln processes with zinc contents of around 30% by weight.

Die Entsorgung von zinkarmen Hüttenstäuben und -schlämmen mit einem Zinkgehalt zwischen 0,1 und 10 Gew.-% erfolgt heute durch Einsatz dieser Stoffe in Elektrolichtbogenöfen. Die An­reicherung des Zinkes erfolgt in den Abgasfiltern bis zu einer Zinkkonzentration um 20 Gew.-%. Beim Einsatz von zinkhältigen Stäuben im Konverter wurden bereits Überlegungen angestellt, die sogenannte Zinkspirale, d.h. den Kreislauf zwischen Verdampfung und Kondensation des Zinkes im Inneren des Konverters so weit zu treiben, daß zinkhältige Stäube von etwa 20 Gew.-% erhalten werden können. Mit einer derartigen Verfahrensweise ist allerdings der metallurgische Nachteil verbunden, daß der Zinkgehalt im Stahl wegen der hohen Reaktionstemperatur ansteigt, so daß insgesamt wiederum eine ungenügende Wirtschaftlichkeit beim Einsatz der Zinkhütten resultiert.Today, the disposal of low-zinc metallurgical dusts and sludges with a zinc content between 0.1 and 10% by weight takes place by using these materials in electric arc furnaces. The zinc is enriched in the exhaust gas filters up to a zinc concentration of 20% by weight. When using zinc-containing dusts in the converter, considerations have already been made, the so-called zinc spiral, i.e. to drive the cycle between evaporation and condensation of the zinc in the interior of the converter to such an extent that zinc-containing dusts of about 20% by weight can be obtained. Such a procedure, however, has the metallurgical disadvantage that the zinc content in the steel rises due to the high reaction temperature, so that overall an inadequate economy results when using the zinc smelters.

Die Erfindung zielt nun darauf ab, ein einfaches und kosten­günstiges Verfahren zur Verwertung von zinkhältigen Hütten­stäuben und -schlämmen zu schaffen, mit welchem sowohl Hochofen-, Gicht- und LD-Mischschlämme als auch die bei der Trockenentstaubung anfallenden Gicht-, Hochofen- und Konver­terstäube entsorgt werden können. Zur Lösung dieser Aufgabe besteht das erfindungsgemäße Verfahren im wesentlichen darin, daß die Zn-hältigen Hüttenstäube und -schlämme mit einem Kohlenstoffträger agglomeriert, kalt brikettiert oder pelle­tiert werden, daß die Agglomerate oder Pellets mit einem Metallisierungsgrad von wenigstens 30 Gew.-%, vorzugsweise wenigstens 40 Gew.-%, eingesetzt werden und daß bei der Herstellung von Pellets durch Zugabe von Kohlenstoffträgern ein C-Gehalt von 20 bis 25% eingestellt wird und der Charge eines Einschmelzofens für das Erschmelzen von Metall aus metallisierten Chargen, wie z.B. Schrott oder Roheisen, zugesetzt werden. Durch Agglomerieren, insbesondere Pelle­tieren, der Stäube, gegebenenfalls unter Zusatz von Schlämmen lassen sich auf diese Weise aus dem Einschmelzprozeß, insbe­sondere dann, wenn der Einschmelzprozeß nach dem sogenannten KVA-Verfahren durchgeführt wird, Stäube mit einem Gehalt von 40 bis 50 Gew.-% Zink gewinnen. Das sogenannte KVA-Verfahren ist ein allothermisches Konverterverfahren, bei welchem Schrott mit Kohle und Zuschlägen in einem geeigneten Schmelz­tiegel mit Erdgas oder flüssigen Brennstoffen und Sauerstoff aufgeschmolzen wird. Auf Grund der reduzierenden Bedingungen für die zinkhältigen Einsatzstoffe in einem Einschmelzofen, insbesondere im Rahmen des KVA-Verfahrens, lassen sich hohe Metallisierungsgrade erzielen und eine weitere Anreicherung von Zink in den entstehenden Hüttenstäuben kann durch Einsatz verzinkter Schrottsorten in einem derartigen Einschmelzofen erzielt werden, bei welchem Metall aus metallisierten Einsatzstoffen erschmolzen wird. Die Brikettierung muß in allen Fällen als Kaltbrikettierung vorgenommen werden, wobei jedoch bevorzugt eine Pelletierung vorgenommen wird, um zusätzlichen Staubaustrag zu vermeiden. Die in der reduzie­renden Atmosphäre des Schmelzofens zum Erschmelzen von Metall aus metallisierenden Chargen erzeugten Zinkmengen werden vom Staub angenommen, wohingegen das Oxid in die Schlacke ge­ langen würde und verloren geht. Der Anteil von Zinkoxid in der Schlacke bringt die eingangs gezeigten Probleme mit der Zulässigkeit und den Kosten einer Sonderdeponie mit sich. Das vom Staub angenommene Zink erhöht als metallisches Zink das Zinkausbringen und es kann unter weitgehender Nutzung der Eisengutschrift durch bereits erfolgte Metallisierung bei den Trockenentstaubungen noch eine weitere Verbesserung des Eisenausbringens erzielt werden, wenn durch Zugabe von Kohlenstoffträgern, vorzugsweise Gicht- und Hochofenschlämme als Kohlenstoffträger, eine Ausreduktion von nicht-metalli­sierten Anteilen der Hüttenwerkstäube erzielt wird. Die gegebenenfalls nicht reduzierten oxidischen Anteile, u.zw. sowohl die oxidischen Eisenanteile als auch gegebenenfalls in die Schlacke gelangte Zinkoxidanteile können nach Zerklei­nerung und Magnetscheidung über den Konverterprozeß neuerlich nutzbar gemacht werden, so daß sich in Summe eine nahezu 100%-ige Wiederverwertung sowohl der Zink- als auch der Eisenfracht der Hüttenabfälle, Stäube und Schlämme bei überaus geringen Kosten ergibt. Die im Rahmen des erfindungs­gemäßen Verfahrens einzusetzenden Agglomerate oder Pellets werden mit einem Metallisierungsgrad von wenigstens 30 Gew.-%, vorzugsweise wenigstens 40 Gew.-%, eingesetzt, wobei ein derartig hoher Metallisierungsgrad dadurch sicher­gestellt werden kann, daß bei der Herstellung der Pellets durch Zugabe von Kohlenstoffträgern ein C-Gehalt von 20 bis 25 Gew.-% eingestellt wird.The invention now aims to provide a simple and inexpensive method for recycling zinc-containing dust and sludge, with which both Blast furnace, gout and LD mixed sludge as well as the gust, blast furnace and converter dust arising from dry dedusting can be disposed of. To achieve this object, the process according to the invention essentially consists in that the Zn-containing metallurgical dusts and sludges are agglomerated, cold briquetted or pelletized with a carbon carrier, that the agglomerates or pellets with a degree of metallization of at least 30% by weight, preferably at least 40% by weight, and that a C content of 20 to 25% is set in the production of pellets by adding carbon carriers and the batch of a melting furnace for melting metal from metallized batches, such as scrap or pig iron, be added. By agglomerating, in particular pelletizing, the dusts, optionally with the addition of sludges, dusts with a content of 40 to 50% by weight can be obtained from the melting process, in particular if the melting process is carried out according to the so-called KVA process. Win zinc. The so-called KVA process is an allothermal converter process in which scrap with coal and aggregates is melted in a suitable crucible with natural gas or liquid fuels and oxygen. Due to the reducing conditions for the zinc-containing feedstocks in a smelting furnace, especially in the context of the KVA process, high levels of metallization can be achieved and a further enrichment of zinc in the smelting dust can be achieved by using galvanized scrap types in such a smelting furnace, in which Metal is melted from metallized feedstocks. In all cases, the briquetting must be carried out as cold briquetting, but pelleting is preferably carried out in order to avoid additional dust discharge. The amounts of zinc produced in the reducing atmosphere of the melting furnace for melting metal from metallizing batches are accepted by the dust, whereas the oxide in the slag would last and get lost. The proportion of zinc oxide in the slag brings with it the problems with the admissibility and the costs of a special landfill shown at the beginning. The zinc taken up by the dust increases the zinc yield as metallic zinc and, using the iron credit to a large extent, already achieved metallization in dry dedusting, a further improvement in iron spreading can be achieved if one adds carbon carriers, preferably top and blast furnace sludges as carbon carriers Reduction of non-metallized parts of the metallurgical dusts is achieved. The possibly non-reduced oxidic components, etc. Both the oxidic iron components and any zinc oxide components that may have got into the slag can be used again after comminution and magnetic separation via the converter process, so that in total there is an almost 100% recycling of both the zinc and the iron load of the metallurgical waste, dusts and Sludge at very low cost. The agglomerates or pellets to be used in the process according to the invention are used with a degree of metallization of at least 30% by weight, preferably at least 40% by weight, it being possible to ensure such a high degree of metallization by adding during the production of the pellets a carbon content of 20 to 25% by weight is set for carbon carriers.

Während die Brikettierung mit relativ hohen anlagentechni­schen Investitionen verbunden ist, kann eine Pelletierung mit relativ einfachen Mitteln unter Erhalt von gute Festigkeit aufweisenden Pellets durchgeführt werden. Mit Vorteil wird zur Erhöhung der Festigkeit der Pellets und damit zur Verringerung eines zusätzlichen Staubaustrages zur Härtung und Trocknung der Pellets ein Bindemittel, wie Kalkmilch und/oder Kalk, zugesetzt. Mit derartigen Pellets können die üblicherweise im KVA-Verfahren mitchargierten Zuschlagstoffe in geringeren Mengen eingesetzt werden, und es kann insbe­sondere ein gegebenenfalls erwünschter Kalkzusatz in dem gleichen Ausmaß reduziert werden, als er zur Härtung und Trocknung der Pellets bereits Verwendung gefunden hat.While briquetting is associated with relatively high investments in plant technology, pelleting can be carried out with relatively simple means while maintaining pellets with good strength. A binder such as lime milk and / or lime is advantageously added to increase the strength of the pellets and thus to reduce additional dust discharge for hardening and drying the pellets. Such pellets can be used to charge the additives that are usually charged with the KVA process can be used in smaller amounts, and in particular an optionally desired addition of lime can be reduced to the same extent as it has already been used for curing and drying the pellets.

Mit Vorteil werden im Rahmen des erfindungsgemäßen Verfahrens Agglomerate oder Pellets der nachfolgenden Zusammensetzung:
20 - 25 Gew.-% Kohlenstoffträger
5 Gew.-% Bindemittel
Rest Hüttenstaub enthaltend ZnO, und/oder PbO und/oder Fe₂O₃ und/oder MgO und/oder SiO₂ und/oder CaO
eingesetzt. Bei Verwendung derartiger Bindemittel und Kohlen­stoffträger enthaltender Pellets kann eine hohe Metalli­sierung des in den Stäuben enthaltenen Zinks sichergestellt werden, und es kann das Zink in der gewünschten Weise mit dem Staub des Schmelzprozesses ausgetragen werden, wobei der Anteil des Zinkes als Zinkoxid in der Schlacke minimiert werden kann.In the process according to the invention, agglomerates or pellets of the following composition are advantageously:
20-25% by weight carbon carrier
5% by weight of binder
Rest of hut dust containing ZnO, and / or PbO and / or Fe₂O₃ and / or MgO and / or SiO₂ and / or CaO
used. When using such pellets containing binders and carbon carriers, a high metallization of the zinc contained in the dusts can be ensured and the zinc can be discharged in the desired manner with the dust of the melting process, the proportion of zinc as zinc oxide in the slag being minimized can.

Im Rahmen des erfindungsgemäßen Verfahrens wird insbesondere im Hinblick auf das KVA-Verfahren, bei welchem die für das Erschmelzen von schmelzflüssigem Eisen aus Schrott erforder­liche Schmelzwärme durch Brenner im Inneren des Ofens aufge­bracht wird, das Verfahren mit Vorteil so geführt werden, daß die Agglomerate, Briketts oder Pellets in einer Menge von 2 bis 8 Gew.-%, vorzugsweise 5 Gew.-%, der metallischen Charge zugesetzt werden. Es lassen sich somit ohne Beeinträchtigung des Schmelzverfahrens relativ hohe Anteile an Hüttenstäuben bzw. Hüttenschlämmen aufarbeiten, wobei gleichzeitig sicher­gestellt wird, daß der in den zinkhältigen Stäuben enthaltene Anteil an Zink als metallisiertes Zink in den KVA-Staub und nicht in die Schlacke gelangt.Within the scope of the method according to the invention, in particular with regard to the KVA method, in which the melting heat required for melting molten iron from scrap is applied by burners inside the furnace, the method is advantageously carried out in such a way that the agglomerates, briquettes or pellets in an amount of 2 to 8 wt .-%, preferably 5 wt .-%, are added to the metallic batch. It is thus possible to process relatively high proportions of metallurgical dusts or sludge without affecting the melting process, while at the same time ensuring that the proportion of zinc contained in the zinc-containing dusts gets into the KVA dust and not into the slag as metallized zinc.

Claims (4)

1. Verfahren zur Auswertung von Zn-hältigen Hüttenstäuben und -schlämmen, dadurch gekennzeichnet, daß die Zn-hältigen Hüttenstäube und -schlämme mit einem Kohlenstoffträger agglomeriert, kalt brikettiert oder pelletiert werden, daß die Agglomerate oder Pellets mit einem Metallisierungsgrad von wenigstens 30 Gew.-%, vorzugsweise 40 Gew.-%, eingesetzt werden und daß bei der Herstellung von Pellets durch Zugabe von Kohlenstoffträgern ein C-Gehalt von 20 bis 25% einge­stellt wird und der Charge eines Einschmelzofens für das Erschmelzen von Metall aus metallisierten Chargen, wie z.B. Schrott oder Roheisen, zugesetzt werden.1. A method for evaluating Zn-containing steel dusts and sludges, characterized in that the Zn-containing steel dusts and sludges are agglomerated with a carbon carrier, cold briquetted or pelletized, that the agglomerates or pellets with a degree of metallization of at least 30 wt. -%, preferably 40 wt .-%, and that a C content of 20 to 25% is set in the production of pellets by adding carbon carriers and the batch of a melting furnace for melting metal from metallized batches, such as Scrap or pig iron. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Härtung und Trocknung der Pellets Bindemittel, wie z.B. Kalkmilch und/oder Kalk, zugesetzt werden.2. The method according to claim 1, characterized in that for curing and drying the pellets binders, such as. Lime milk and / or lime can be added. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Agglomerate, Pellets oder Briketts der nachfolgenden Zusammensetzung:
20 bis 25 Gew.-% Kohlenstoffträger
5 Gew.-% Bindemittel
Rest Hüttenstaub enthaltend, ZnO und/oder PbO und/oder Fe₂O₃ und/oder MgO und/oder SiO₂ und/oder CaO
eingesetzt werden.3. The method according to claim 1 or 2, characterized in that agglomerates, pellets or briquettes of the following composition:
20 to 25 wt .-% carbon carrier
5% by weight of binder
Remaining hut dust containing ZnO and / or PbO and / or Fe₂O₃ and / or MgO and / or SiO₂ and / or CaO
be used. 4. Verfahren nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, daß die Agglomerate, Briketts oder Pellets in einer Menge von 2 bis 8 Gew.-%, vorzugsweise 5 Gew.-%, der metallisierten Charge zugesetzt werden.4. The method according to any one of claims 1, 2 or 3, characterized in that the agglomerates, briquettes or pellets in an amount of 2 to 8 wt .-%, preferably 5 wt .-%, are added to the metallized batch.
EP19890890090 1988-04-08 1989-04-04 Process for valorization of zinciferous flue dusts and muds Withdrawn EP0336923A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT925/88 1988-04-08
AT925/88A AT392289B (en) 1988-04-08 1988-04-08 METHOD FOR UTILIZING ZINC-CONTAINED DUST AND SLUDGE

Publications (2)

Publication Number Publication Date
EP0336923A2 true EP0336923A2 (en) 1989-10-11
EP0336923A3 EP0336923A3 (en) 1990-02-14

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EP19890890090 Withdrawn EP0336923A3 (en) 1988-04-08 1989-04-04 Process for valorization of zinciferous flue dusts and muds

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US (1) US4940487A (en)
EP (1) EP0336923A3 (en)
JP (1) JPH0215130A (en)
KR (1) KR930001334B1 (en)
CN (1) CN1036798A (en)
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WO1999016917A1 (en) * 1997-09-30 1999-04-08 Voest-Alpine Stahl Donawitz Gmbh Pyrometallurgical method and device for separating zinc and/or cadmium from lead in metallurgical residues

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ATA85095A (en) * 1995-05-18 1996-10-15 Voest Alpine Stahl METHOD AND DEVICE FOR TREATING METAL-CONTAINING DUST FROM THERMAL, METALLURGICAL PROCESSES
FR2737503B1 (en) * 1995-08-04 1997-10-10 Wheelabrator Allevard PROCESS FOR THE PREPARATION OF MINERAL PIGMENTS, MINERAL PIGMENTS OBTAINED THEREBY, AND INSTALLATION FOR CARRYING OUT SUCH A PROCESS
AT405054B (en) 1997-06-18 1999-05-25 Voest Alpine Ind Anlagen METHOD AND PLANT FOR PRODUCING AN IRON MEL WITH THE USE OF IRON-CONTAINING RESIDUAL MATERIALS
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DE19946430A1 (en) 1999-09-28 2001-04-05 Bus Zinkrecycling Freiberg Process for recycling secondary raw materials containing iron, zinc and lead
EP1199373A1 (en) * 2000-10-17 2002-04-24 Universite Catholique De Louvain Agglomerates of and process for the treatment of metallurgical dust
DE602005010888D1 (en) * 2004-10-05 2008-12-18 Wurth Paul Sa TREATMENT OF STEELWORK BALANCING IN A MULTI-STAGE FLOOR OVEN
EP1645645A1 (en) * 2004-10-11 2006-04-12 Paul Wurth S.A. Treatment of steel plant sludges in a multi-stage furnace
JP5090655B2 (en) * 2006-03-31 2012-12-05 Ｎｔｎ株式会社 Steelmaking dust recycling method
JP5554478B2 (en) * 2008-07-11 2014-07-23 株式会社神戸製鋼所 Method for producing briquettes, method for producing reduced metals, and method for separating zinc or lead
EP2298941A4 (en) * 2008-07-11 2016-10-19 Kobe Steel Ltd Briquette manufacturing method, reductive metal manufacturing method, and zinc or lead separation method
JP5554481B2 (en) * 2008-08-26 2014-07-23 株式会社神戸製鋼所 Method for producing briquette, method for producing reduced iron, and method for separating zinc or lead
JP5571345B2 (en) * 2009-09-29 2014-08-13 株式会社神戸製鋼所 Method for producing briquettes, method for producing reduced metals, and method for separating zinc or lead
JP5770118B2 (en) * 2012-02-02 2015-08-26 新日鐵住金株式会社 Method for producing reduced iron
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WO1998001590A1 (en) * 1996-07-10 1998-01-15 Voest-Alpine Industrieanlagenbau Gmbh Process for reusing dusts from metallurgical processes, such as steel converter dusts containing zinc
WO1999016917A1 (en) * 1997-09-30 1999-04-08 Voest-Alpine Stahl Donawitz Gmbh Pyrometallurgical method and device for separating zinc and/or cadmium from lead in metallurgical residues

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ATA92588A (en) 1990-08-15
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AT392289B (en) 1991-02-25
HUT49913A (en) 1989-11-28
AR240339A1 (en) 1990-03-30
ZA892187B (en) 1989-11-29
CN1036798A (en) 1989-11-01

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